Improvement in carriage-jacks



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Letters Patent No. 93,786, managen 17, 1869,

mPRovnMnNr m CARRIAGE-Jacks.

The- Schedule referred to in these Letters Patent and making part of the same.`

To all whom it may concern Beit known tliat I, JOSEPH. E. WOLL, of Allegheny City, in the county oi'Allegheny,- and State ot' Pennsylvania, have invented a new and useful Improvement in Wheel-Jacks; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being lhad to the accompanying. drawing, making a part of this specification, in which- Figure 1 is a perspective view of my improved jack;

Figure 2 isa sectional view of the same, through the line :1c-x, fig. l;

Figure 3 is a sectional view, through the line 1j-y, fig. 1; and

Figure ,4 is a perspectiveview of the lever.

Like letters of reference indicate like -parts' in each.

The nature of my invent-ion consists in the construcv tion of a wheel-jack, having an upright shaft or standard, which works .up and down in a guiding-box, closed on threesides, being held steady on the open side by the backs of two tooth-racks. 'I he standard is worked up and down by a bent lever, which rests ou trunnions or bearings upon the teeth of the racks, which are' nailed to the sides ofthe box in front of the standard.

' Also, a catch on one side-of the covered box, which gears into notches in the side ofthe upright or standard, the functions and operations of which parts are hereinafter described.

To'enable others skilled in the art to make and' use my invention, .I will proceed to describe its construction and manner of operation. t

In the drawinga represents the guiding-box, in which works the standard b, which is held in a perpendicular position by the toothed racks c c, which are fastened on the inside agaiustthe sides of 'the box a..

\ The standard b is raised by the lever (l, which plays through an opening, g, and is supported by trunnions or bearings e c, which bearingsrest upon the teeth f of the racks c c.

The catch h, atthe side of the box a, gears into the ratchet-rack fi, the construction of which allows an upwardbnt not a downward motion, unless the catch he thrown out of gear, for the purpose of upholding the standards b when the support ofthe lever (l is withdrawn.

The lever l has an elbow, m, to the sides of which trunnions o r bearings c are '(Lttacheil, and a short arm, n, which works against and supports the standards l1.

The operation'ot my improved wheel-jack is as followsz' -The jack is placedunder the object to be raised. When the level' is at rest-,the handle stands in an al#` most vertical position, theA bearings resting on the tooth in-the racks c c, and the standards resting upon the short arm n.

The handle isv then pressed down. This throws up the end of the short arm n, which, lying under /the lower end of the standard b, raises it,"until the pin c, which runs through andfprojects from e'ach side of the end of the short arm An, to prevent its coming past the racks c c, comes against the backs of the racks. c Ac, when the arm n is heldin a perpendicular position, as shown in ligs. 1 and 2,'the weight on the standard pressing it down andagainst the back of the racks c c, thus not permitting it to fall backward,4 and the L pin o catching on the racks not permitting it to fall forward. If it is desired to raise the object any higher, the

lever is slipped oi of the rst tooth of the racks c c,

and placed on the next one, the catch h at the side of the box a hooking into the notches of the ratchet-rack t t' on the standard b as soon as the lever d is Withdrawn from under the standard, thus'keeping it from dropping.

he handle-is then bent down and the `standard raised, as before described, the ratchetprac'k i easily slipping past the bevelled or lower lside of the catch in the aseent,.but catching on the tooth theinstant it begins to descend.

When it is desired to let down the object, I raise the standard b slightly, by means of the lever d, so as to relieve the catch h of the weight pressing upon it', throw back the tooth of the catch, by pressing down` the handle p, so asrto allow the rack fito slide past it; lower the standard, by raising the handle of the lever, until it assumes a perpendicular position; then, by allowing the tooth to engage the rack t', I'transfer the pressure'of the weight from` the lever'tc the'catch, take the lever from olf that tooth, and place it on a lower one, and repeat the operation until the object is lowered.

In oase of very 'heavy weights, I leave the short arm a in a perpendicular position, as shown iin' figs. 1 and 2, where it acts as a support to the standard b, reliev- 'ing'th'e catch h of part or all of the strain.

If it is desired to make the bevelled edge of the end of the short .arm n work easily against the lower end ofthe standard l), a small friction-roller may be inserted in the end of thestandard.

It isnot necessary to have the lever d bent in the handle, as shown in the drawing, it being made 'so only for convenience.

The teeth of the racks, top and bottoni plates of the standard, and the lever, are made of iron or other hard material, whilethe other parts I prefer to make of wood, on accountof its lightness and cheapness.

"What Iclairn as Vmy invention', and desire to secure by Letters Patent, is-

The bent lever d, operating against the lower end of an upright, b, and having bearings which operate in toothed -racks c c, in combination with a ratchetrack, i, vand catch 71, arranged substantially' as hereinbefore set forth.

In testimony whereof, I, the said .I'osnru E. WOLL, have hereuntaset niy'hand. JOS. E". WOLL.

NVitnesses JOHN GLENN, Trios. B'. Kann. 

